ADALM1000 Voltage Output

Hi.

I'm using pixel pulse with the ADALM1000 set up to "source voltage and measure current". I have no load connected but I want to produce a steady DC of about 1.5V, and looking at the output on the DSO I see on a 1.5V square wave. This is also true if I select the sinewave output I see a very erratic sine wave. Is this a settings problem?

Cheers